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Commit | Line | Data |
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1da177e4 LT |
1 | /* Serialport functions for debugging |
2 | * | |
18b0f346 | 3 | * Copyright (c) 2000-2007 Axis Communications AB |
1da177e4 LT |
4 | * |
5 | * Authors: Bjorn Wesen | |
6 | * | |
7 | * Exports: | |
8 | * console_print_etrax(char *buf) | |
9 | * int getDebugChar() | |
10 | * putDebugChar(int) | |
11 | * enableDebugIRQ() | |
12 | * init_etrax_debug() | |
13 | * | |
1da177e4 LT |
14 | */ |
15 | ||
1da177e4 LT |
16 | #include <linux/console.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/major.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/tty.h> | |
21 | #include <asm/system.h> | |
22 | #include <asm/arch/svinto.h> | |
23 | #include <asm/io.h> /* Get SIMCOUT. */ | |
24 | ||
18b0f346 JN |
25 | extern void reset_watchdog(void); |
26 | ||
1da177e4 LT |
27 | struct dbg_port |
28 | { | |
29 | unsigned int index; | |
30 | const volatile unsigned* read; | |
31 | volatile char* write; | |
32 | volatile unsigned* xoff; | |
33 | volatile char* baud; | |
34 | volatile char* tr_ctrl; | |
35 | volatile char* rec_ctrl; | |
36 | unsigned long irq; | |
37 | unsigned int started; | |
38 | unsigned long baudrate; | |
39 | unsigned char parity; | |
40 | unsigned int bits; | |
41 | }; | |
42 | ||
43 | struct dbg_port ports[]= | |
44 | { | |
45 | { | |
46 | 0, | |
47 | R_SERIAL0_READ, | |
48 | R_SERIAL0_TR_DATA, | |
49 | R_SERIAL0_XOFF, | |
50 | R_SERIAL0_BAUD, | |
51 | R_SERIAL0_TR_CTRL, | |
52 | R_SERIAL0_REC_CTRL, | |
05b4c28c MS |
53 | IO_STATE(R_IRQ_MASK1_SET, ser0_data, set), |
54 | 0, | |
55 | 115200, | |
56 | 'N', | |
57 | 8 | |
1da177e4 LT |
58 | }, |
59 | { | |
60 | 1, | |
61 | R_SERIAL1_READ, | |
62 | R_SERIAL1_TR_DATA, | |
63 | R_SERIAL1_XOFF, | |
64 | R_SERIAL1_BAUD, | |
65 | R_SERIAL1_TR_CTRL, | |
66 | R_SERIAL1_REC_CTRL, | |
05b4c28c MS |
67 | IO_STATE(R_IRQ_MASK1_SET, ser1_data, set), |
68 | 0, | |
69 | 115200, | |
70 | 'N', | |
71 | 8 | |
1da177e4 LT |
72 | }, |
73 | { | |
74 | 2, | |
75 | R_SERIAL2_READ, | |
76 | R_SERIAL2_TR_DATA, | |
77 | R_SERIAL2_XOFF, | |
78 | R_SERIAL2_BAUD, | |
79 | R_SERIAL2_TR_CTRL, | |
80 | R_SERIAL2_REC_CTRL, | |
05b4c28c MS |
81 | IO_STATE(R_IRQ_MASK1_SET, ser2_data, set), |
82 | 0, | |
83 | 115200, | |
84 | 'N', | |
85 | 8 | |
1da177e4 LT |
86 | }, |
87 | { | |
88 | 3, | |
89 | R_SERIAL3_READ, | |
90 | R_SERIAL3_TR_DATA, | |
91 | R_SERIAL3_XOFF, | |
92 | R_SERIAL3_BAUD, | |
93 | R_SERIAL3_TR_CTRL, | |
94 | R_SERIAL3_REC_CTRL, | |
05b4c28c MS |
95 | IO_STATE(R_IRQ_MASK1_SET, ser3_data, set), |
96 | 0, | |
97 | 115200, | |
98 | 'N', | |
99 | 8 | |
1da177e4 LT |
100 | } |
101 | }; | |
102 | ||
18b0f346 | 103 | #ifdef CONFIG_ETRAX_SERIAL |
05b4c28c | 104 | extern struct tty_driver *serial_driver; |
18b0f346 | 105 | #endif |
1da177e4 LT |
106 | |
107 | struct dbg_port* port = | |
108 | #if defined(CONFIG_ETRAX_DEBUG_PORT0) | |
109 | &ports[0]; | |
110 | #elif defined(CONFIG_ETRAX_DEBUG_PORT1) | |
111 | &ports[1]; | |
112 | #elif defined(CONFIG_ETRAX_DEBUG_PORT2) | |
113 | &ports[2]; | |
114 | #elif defined(CONFIG_ETRAX_DEBUG_PORT3) | |
115 | &ports[3]; | |
116 | #else | |
117 | NULL; | |
118 | #endif | |
1da177e4 | 119 | |
05b4c28c MS |
120 | static struct dbg_port* kgdb_port = |
121 | #if defined(CONFIG_ETRAX_KGDB_PORT0) | |
122 | &ports[0]; | |
123 | #elif defined(CONFIG_ETRAX_KGDB_PORT1) | |
124 | &ports[1]; | |
125 | #elif defined(CONFIG_ETRAX_KGDB_PORT2) | |
126 | &ports[2]; | |
127 | #elif defined(CONFIG_ETRAX_KGDB_PORT3) | |
128 | &ports[3]; | |
129 | #else | |
130 | NULL; | |
131 | #endif | |
1da177e4 LT |
132 | |
133 | static void | |
05b4c28c | 134 | start_port(struct dbg_port* p) |
1da177e4 LT |
135 | { |
136 | unsigned long rec_ctrl = 0; | |
137 | unsigned long tr_ctrl = 0; | |
138 | ||
05b4c28c | 139 | if (!p) |
1da177e4 LT |
140 | return; |
141 | ||
05b4c28c | 142 | if (p->started) |
1da177e4 | 143 | return; |
05b4c28c | 144 | p->started = 1; |
1da177e4 | 145 | |
05b4c28c | 146 | if (p->index == 0) |
1da177e4 LT |
147 | { |
148 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma6); | |
149 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma6, unused); | |
150 | } | |
05b4c28c | 151 | else if (p->index == 1) |
1da177e4 LT |
152 | { |
153 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma8); | |
154 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma8, usb); | |
155 | } | |
05b4c28c | 156 | else if (p->index == 2) |
1da177e4 LT |
157 | { |
158 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma2); | |
159 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma2, par0); | |
160 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma3); | |
161 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma3, par0); | |
162 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, ser2, select); | |
163 | } | |
164 | else | |
165 | { | |
166 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma4); | |
167 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, par1); | |
168 | genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma5); | |
169 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, par1); | |
170 | genconfig_shadow |= IO_STATE(R_GEN_CONFIG, ser3, select); | |
171 | } | |
172 | ||
173 | *R_GEN_CONFIG = genconfig_shadow; | |
174 | ||
05b4c28c | 175 | *p->xoff = |
1da177e4 LT |
176 | IO_STATE(R_SERIAL0_XOFF, tx_stop, enable) | |
177 | IO_STATE(R_SERIAL0_XOFF, auto_xoff, disable) | | |
178 | IO_FIELD(R_SERIAL0_XOFF, xoff_char, 0); | |
179 | ||
05b4c28c | 180 | switch (p->baudrate) |
1da177e4 LT |
181 | { |
182 | case 0: | |
183 | case 115200: | |
05b4c28c | 184 | *p->baud = |
1da177e4 LT |
185 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c115k2Hz) | |
186 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c115k2Hz); | |
187 | break; | |
188 | case 1200: | |
05b4c28c | 189 | *p->baud = |
1da177e4 LT |
190 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c1200Hz) | |
191 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c1200Hz); | |
192 | break; | |
193 | case 2400: | |
05b4c28c | 194 | *p->baud = |
1da177e4 LT |
195 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c2400Hz) | |
196 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c2400Hz); | |
197 | break; | |
198 | case 4800: | |
05b4c28c | 199 | *p->baud = |
1da177e4 LT |
200 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c4800Hz) | |
201 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c4800Hz); | |
202 | break; | |
203 | case 9600: | |
05b4c28c | 204 | *p->baud = |
1da177e4 LT |
205 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c9600Hz) | |
206 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c9600Hz); | |
207 | break; | |
208 | case 19200: | |
05b4c28c | 209 | *p->baud = |
1da177e4 LT |
210 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c19k2Hz) | |
211 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c19k2Hz); | |
212 | break; | |
213 | case 38400: | |
05b4c28c | 214 | *p->baud = |
1da177e4 LT |
215 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c38k4Hz) | |
216 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c38k4Hz); | |
217 | break; | |
218 | case 57600: | |
05b4c28c | 219 | *p->baud = |
1da177e4 LT |
220 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c57k6Hz) | |
221 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c57k6Hz); | |
222 | break; | |
223 | default: | |
05b4c28c | 224 | *p->baud = |
1da177e4 LT |
225 | IO_STATE(R_SERIAL0_BAUD, tr_baud, c115k2Hz) | |
226 | IO_STATE(R_SERIAL0_BAUD, rec_baud, c115k2Hz); | |
227 | break; | |
228 | } | |
229 | ||
05b4c28c | 230 | if (p->parity == 'E') { |
1da177e4 LT |
231 | rec_ctrl = |
232 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par, even) | | |
233 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable); | |
234 | tr_ctrl = | |
235 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par, even) | | |
236 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable); | |
05b4c28c | 237 | } else if (p->parity == 'O') { |
1da177e4 LT |
238 | rec_ctrl = |
239 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par, odd) | | |
240 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, enable); | |
241 | tr_ctrl = | |
242 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par, odd) | | |
243 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, enable); | |
244 | } else { | |
245 | rec_ctrl = | |
246 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par, even) | | |
247 | IO_STATE(R_SERIAL0_REC_CTRL, rec_par_en, disable); | |
248 | tr_ctrl = | |
249 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par, even) | | |
250 | IO_STATE(R_SERIAL0_TR_CTRL, tr_par_en, disable); | |
251 | } | |
05b4c28c | 252 | if (p->bits == 7) |
1da177e4 LT |
253 | { |
254 | rec_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_7bit); | |
255 | tr_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_7bit); | |
256 | } | |
257 | else | |
258 | { | |
259 | rec_ctrl |= IO_STATE(R_SERIAL0_REC_CTRL, rec_bitnr, rec_8bit); | |
260 | tr_ctrl |= IO_STATE(R_SERIAL0_TR_CTRL, tr_bitnr, tr_8bit); | |
261 | } | |
262 | ||
05b4c28c | 263 | *p->rec_ctrl = |
1da177e4 LT |
264 | IO_STATE(R_SERIAL0_REC_CTRL, dma_err, stop) | |
265 | IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable) | | |
266 | IO_STATE(R_SERIAL0_REC_CTRL, rts_, active) | | |
267 | IO_STATE(R_SERIAL0_REC_CTRL, sampling, middle) | | |
268 | IO_STATE(R_SERIAL0_REC_CTRL, rec_stick_par, normal) | | |
269 | rec_ctrl; | |
270 | ||
05b4c28c | 271 | *p->tr_ctrl = |
1da177e4 LT |
272 | IO_FIELD(R_SERIAL0_TR_CTRL, txd, 0) | |
273 | IO_STATE(R_SERIAL0_TR_CTRL, tr_enable, enable) | | |
274 | IO_STATE(R_SERIAL0_TR_CTRL, auto_cts, disabled) | | |
275 | IO_STATE(R_SERIAL0_TR_CTRL, stop_bits, one_bit) | | |
276 | IO_STATE(R_SERIAL0_TR_CTRL, tr_stick_par, normal) | | |
277 | tr_ctrl; | |
278 | } | |
279 | ||
280 | static void | |
281 | console_write_direct(struct console *co, const char *buf, unsigned int len) | |
282 | { | |
283 | int i; | |
284 | unsigned long flags; | |
05b4c28c MS |
285 | |
286 | if (!port) | |
287 | return; | |
288 | ||
18b0f346 JN |
289 | local_irq_save(flags); |
290 | ||
1da177e4 LT |
291 | /* Send data */ |
292 | for (i = 0; i < len; i++) { | |
05b4c28c MS |
293 | /* LF -> CRLF */ |
294 | if (buf[i] == '\n') { | |
295 | while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready))) | |
296 | ; | |
297 | *port->write = '\r'; | |
298 | } | |
1da177e4 LT |
299 | /* Wait until transmitter is ready and send.*/ |
300 | while (!(*port->read & IO_MASK(R_SERIAL0_READ, tr_ready))) | |
301 | ; | |
302 | *port->write = buf[i]; | |
303 | } | |
1da177e4 | 304 | |
18b0f346 JN |
305 | /* |
306 | * Feed the watchdog, otherwise it will reset the chip during boot. | |
307 | * The time to send an ordinary boot message line (10-90 chars) | |
308 | * varies between 1-8ms at 115200. What makes up for the additional | |
309 | * 90ms that allows the watchdog to bite? | |
310 | */ | |
311 | reset_watchdog(); | |
312 | ||
313 | local_irq_restore(flags); | |
05b4c28c MS |
314 | } |
315 | ||
1da177e4 LT |
316 | static void |
317 | console_write(struct console *co, const char *buf, unsigned int len) | |
318 | { | |
319 | if (!port) | |
320 | return; | |
321 | ||
322 | #ifdef CONFIG_SVINTO_SIM | |
323 | /* no use to simulate the serial debug output */ | |
324 | SIMCOUT(buf, len); | |
325 | return; | |
326 | #endif | |
327 | ||
05b4c28c | 328 | console_write_direct(co, buf, len); |
1da177e4 LT |
329 | } |
330 | ||
331 | /* legacy function */ | |
332 | ||
333 | void | |
334 | console_print_etrax(const char *buf) | |
335 | { | |
336 | console_write(NULL, buf, strlen(buf)); | |
337 | } | |
338 | ||
339 | /* Use polling to get a single character FROM the debug port */ | |
340 | ||
341 | int | |
342 | getDebugChar(void) | |
343 | { | |
344 | unsigned long readval; | |
345 | ||
05b4c28c MS |
346 | if (!kgdb_port) |
347 | return 0; | |
348 | ||
1da177e4 | 349 | do { |
05b4c28c | 350 | readval = *kgdb_port->read; |
1da177e4 LT |
351 | } while (!(readval & IO_MASK(R_SERIAL0_READ, data_avail))); |
352 | ||
353 | return (readval & IO_MASK(R_SERIAL0_READ, data_in)); | |
354 | } | |
355 | ||
356 | /* Use polling to put a single character to the debug port */ | |
357 | ||
358 | void | |
359 | putDebugChar(int val) | |
360 | { | |
05b4c28c MS |
361 | if (!kgdb_port) |
362 | return; | |
363 | ||
364 | while (!(*kgdb_port->read & IO_MASK(R_SERIAL0_READ, tr_ready))) | |
1da177e4 | 365 | ; |
05b4c28c | 366 | *kgdb_port->write = val; |
1da177e4 LT |
367 | } |
368 | ||
369 | /* Enable irq for receiving chars on the debug port, used by kgdb */ | |
370 | ||
371 | void | |
372 | enableDebugIRQ(void) | |
373 | { | |
05b4c28c MS |
374 | if (!kgdb_port) |
375 | return; | |
376 | ||
377 | *R_IRQ_MASK1_SET = kgdb_port->irq; | |
1da177e4 LT |
378 | /* use R_VECT_MASK directly, since we really bypass Linux normal |
379 | * IRQ handling in kgdb anyway, we don't need to use enable_irq | |
380 | */ | |
381 | *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set); | |
382 | ||
05b4c28c | 383 | *kgdb_port->rec_ctrl = IO_STATE(R_SERIAL0_REC_CTRL, rec_enable, enable); |
1da177e4 LT |
384 | } |
385 | ||
386 | static int __init | |
387 | console_setup(struct console *co, char *options) | |
388 | { | |
389 | char* s; | |
390 | ||
391 | if (options) { | |
392 | port = &ports[co->index]; | |
393 | port->baudrate = 115200; | |
394 | port->parity = 'N'; | |
395 | port->bits = 8; | |
396 | port->baudrate = simple_strtoul(options, NULL, 10); | |
397 | s = options; | |
398 | while(*s >= '0' && *s <= '9') | |
399 | s++; | |
400 | if (*s) port->parity = *s++; | |
401 | if (*s) port->bits = *s++ - '0'; | |
402 | port->started = 0; | |
05b4c28c | 403 | start_port(0); |
1da177e4 LT |
404 | } |
405 | return 0; | |
406 | } | |
407 | ||
18b0f346 | 408 | |
05b4c28c MS |
409 | /* This is a dummy serial device that throws away anything written to it. |
410 | * This is used when no debug output is wanted. | |
411 | */ | |
412 | static struct tty_driver dummy_driver; | |
413 | ||
414 | static int dummy_open(struct tty_struct *tty, struct file * filp) | |
415 | { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static void dummy_close(struct tty_struct *tty, struct file * filp) | |
420 | { | |
421 | } | |
422 | ||
423 | static int dummy_write(struct tty_struct * tty, | |
424 | const unsigned char *buf, int count) | |
425 | { | |
426 | return count; | |
427 | } | |
428 | ||
429 | static int | |
430 | dummy_write_room(struct tty_struct *tty) | |
431 | { | |
432 | return 8192; | |
433 | } | |
434 | ||
435 | void __init | |
436 | init_dummy_console(void) | |
437 | { | |
438 | memset(&dummy_driver, 0, sizeof(struct tty_driver)); | |
439 | dummy_driver.driver_name = "serial"; | |
440 | dummy_driver.name = "ttyS"; | |
441 | dummy_driver.major = TTY_MAJOR; | |
442 | dummy_driver.minor_start = 68; | |
443 | dummy_driver.num = 1; /* etrax100 has 4 serial ports */ | |
444 | dummy_driver.type = TTY_DRIVER_TYPE_SERIAL; | |
445 | dummy_driver.subtype = SERIAL_TYPE_NORMAL; | |
446 | dummy_driver.init_termios = tty_std_termios; | |
447 | dummy_driver.init_termios.c_cflag = | |
448 | B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ | |
331b8319 | 449 | dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
05b4c28c MS |
450 | |
451 | dummy_driver.open = dummy_open; | |
452 | dummy_driver.close = dummy_close; | |
453 | dummy_driver.write = dummy_write; | |
454 | dummy_driver.write_room = dummy_write_room; | |
455 | if (tty_register_driver(&dummy_driver)) | |
456 | panic("Couldn't register dummy serial driver\n"); | |
457 | } | |
458 | ||
459 | static struct tty_driver* | |
460 | etrax_console_device(struct console* co, int *index) | |
461 | { | |
462 | if (port) | |
463 | *index = port->index; | |
18b0f346 JN |
464 | else |
465 | *index = 0; | |
466 | #ifdef CONFIG_ETRAX_SERIAL | |
05b4c28c | 467 | return port ? serial_driver : &dummy_driver; |
18b0f346 JN |
468 | #else |
469 | return &dummy_driver; | |
470 | #endif | |
05b4c28c MS |
471 | } |
472 | ||
1da177e4 LT |
473 | static struct console sercons = { |
474 | name : "ttyS", | |
475 | write: console_write, | |
476 | read : NULL, | |
477 | device : etrax_console_device, | |
478 | unblank : NULL, | |
479 | setup : console_setup, | |
480 | flags : CON_PRINTBUFFER, | |
481 | index : -1, | |
482 | cflag : 0, | |
483 | next : NULL | |
484 | }; | |
485 | static struct console sercons0 = { | |
486 | name : "ttyS", | |
487 | write: console_write, | |
488 | read : NULL, | |
489 | device : etrax_console_device, | |
490 | unblank : NULL, | |
491 | setup : console_setup, | |
492 | flags : CON_PRINTBUFFER, | |
493 | index : 0, | |
494 | cflag : 0, | |
495 | next : NULL | |
496 | }; | |
497 | ||
498 | static struct console sercons1 = { | |
499 | name : "ttyS", | |
500 | write: console_write, | |
501 | read : NULL, | |
502 | device : etrax_console_device, | |
503 | unblank : NULL, | |
504 | setup : console_setup, | |
505 | flags : CON_PRINTBUFFER, | |
506 | index : 1, | |
507 | cflag : 0, | |
508 | next : NULL | |
509 | }; | |
510 | static struct console sercons2 = { | |
511 | name : "ttyS", | |
512 | write: console_write, | |
513 | read : NULL, | |
514 | device : etrax_console_device, | |
515 | unblank : NULL, | |
516 | setup : console_setup, | |
517 | flags : CON_PRINTBUFFER, | |
518 | index : 2, | |
519 | cflag : 0, | |
520 | next : NULL | |
521 | }; | |
522 | static struct console sercons3 = { | |
523 | name : "ttyS", | |
524 | write: console_write, | |
525 | read : NULL, | |
526 | device : etrax_console_device, | |
527 | unblank : NULL, | |
528 | setup : console_setup, | |
529 | flags : CON_PRINTBUFFER, | |
530 | index : 3, | |
531 | cflag : 0, | |
532 | next : NULL | |
533 | }; | |
534 | /* | |
535 | * Register console (for printk's etc) | |
536 | */ | |
537 | ||
538 | int __init | |
539 | init_etrax_debug(void) | |
540 | { | |
541 | static int first = 1; | |
542 | ||
543 | if (!first) { | |
05b4c28c MS |
544 | unregister_console(&sercons); |
545 | register_console(&sercons0); | |
546 | register_console(&sercons1); | |
547 | register_console(&sercons2); | |
548 | register_console(&sercons3); | |
549 | init_dummy_console(); | |
1da177e4 LT |
550 | return 0; |
551 | } | |
1da177e4 | 552 | |
05b4c28c MS |
553 | first = 0; |
554 | register_console(&sercons); | |
555 | start_port(port); | |
556 | #ifdef CONFIG_ETRAX_KGDB | |
557 | start_port(kgdb_port); | |
558 | #endif | |
1da177e4 LT |
559 | return 0; |
560 | } | |
1da177e4 | 561 | __initcall(init_etrax_debug); |